Boiler



May 8, 1928., 1,669,321

s. L. BLQCHER BOILER Filed April 1, 1926 2 Sheets-Sheet 1 May 8, 1928. 1,669,321

- s. I... BLOCHER BOILER Filed April 1, 1926 2 Sheets-Sneet 2 Patented May 8, 1928.

UNITED sononton 1;. smears, or simmers-m,

1301mm. 7 i

n pncauonmed April);1926."Seria1 No. 99,150.

This invention relates to steam generators of the coil type or water tube type,-'a=nd one of the objects ofthe' present invention is to providea boiler having a -relativelylarge amount of heating surface in proportion to its size.

a A further object isto provide "a boiler which is particularly coinp'act, which will generate steam've'ry quicklyfand which ma be"used either with oil burners orwit grates and coal as fuel-' A still further objec't is to provide a' boiler so constructed-thatthe water tubes or coils may be readily removed and replacedwhenever desired, whileat the same time securing a tight; joint between the'ends of thewater tubes and the water legs. I

Other objects will appear 'in the oo'urse of the following description.

My invention. is illustrated in the accompanying drawings wherein 1 Figure 1 is a vertical sectional view through a boiler constructed in accordance with my invention;

Fig. 2 is an enlarged fragmentary horizontal section; d

Fig. 3 is a top plan view;

Fig. 4 is a section on the line 4-4 of Figure 1, the coils not being shown;

Fig. 5 is a fragmentary section through the extremity of one of the coils, showing the manner of its connection to the water le Fig. 6 is a top plan view of the base.

Referring to these drawings it will be seen that my improvedboiler comprises the outer.

annular vertically elongated water leg 10 having an inner wall 11, this water leg being closed at its upper and lower ends. Disposed centrally within the annular water leg 10 is a water chamber 12 to which the feed water pipe 13 runs, this feed water pipe running to any suitable feed water pump.

Above the water leg 10 and extending diametrically across this annular water leg is a steam chamber 14 having extending therefrom the steam pipe 15 and having mounted thereon or connected thereto, a safety valve 16. This steam chamber 14 may be supported upon the water leg 10 by means of brackets 17 or in any other suitable manner.

The water leg 10 is connected at four separated points to the steam chamber 14 by means of the coil pipes 18 which extend inward and upward over the space defined by the water leg 10. The water chamber 12 is also conn'ecte'dto the steam chamber 14 by means of a coil pipe 19:

The water chamber 12 i provided within plurality ofblowo'if nipples or pipes 20"normally" closed by plugs in the usual manner, and the water leg is provided with a plurality of clean out plugs 21. Thelowenendof the central chamber 12 is connected by pipes 22 tothe lower end of the water leg,mthrere being a plurality of these pipes -22"and :these pipesbeing preferably convoluted.

Extending upward between the water chamber 12 and the water leg 10 are a plurality ofwater heating'coils 23. These coils are so-arranged that the convolutions of one coil overlap the convolutions' of the next 'adjacent coils in the mannerillustrated'inFigthe water leg 10 and the water chamber 12 is filled with tl'ieseinterfitting coils. Each of these-"coils'is connected'at its upperand lower ends to the water leg 10 in any suitable manner but preferably in the manner illustrated in detail in Figure 5. To this end an opening is formed in the inner wall of the water leg 10, this opening being screwthreaded as at 2%. Disposed within this opening isa sleeve 25, the inner end of which is tapered and exteriorly screw-threaded to engage the threads 24. The inner face of the sleeve midway its ends is formed with the tapering seat 26 and beyond this seat with the interior screw-threads 27. Fitting tightly around the tube or pipe 23 is a nut 28, the head of which is formed for the ap plication of a wrench and the exterior face of which is screw-threaded for engagement with the screw-threads 27.

Attached to the pipe 23, as by brazin is a tapering sleeve 29, the exterior of whic will fit the tapered seat 26. The end of the coil 23 is passed through the nut 28. The tapered sleeve or head 29 is then brazed upon the end of the pipe or tube and the tube inserted within the sleeve 25. Then the nut 28 is turned home, bearing against the head 29 on the tube 23 and forcing this tube into engagement with the sleeve 25 and the head 29 against the seat 26. Each and every tube in the boiler is at in place with this nipple, as above descri ed, except where ure 2, sothat nearly theentire sphce between I the tubes are greater than one inch in diama hood 30 having apertures through which the products of combustion may escape.

The base of the boiler may be of any suitable character and I have illustrated ,a base or lower section 31 having therein a gas burner or oil burner 32 of very simple character, which may be used for the purpose of heating the water in the coils. I have illustrated a feed pipe 33 extending into the burner and extending across the top of the burner so that the oil, it oil is used, is preheated or vaporized prior to the introduction of the fuel into the burner pipes but I do not wish to be limited to the useof an oil burner as a heating means for the boiler inasmuch as any other heating means may be used such as gas, coal or other fuel, and of course, this heating section 31 will be modified to suit the particular form of heating means used.

A boiler constructed in accordance with my invention is extremely compact, raises steam very quickly and secures a high pressure of steam relative to the size of the boiler and the amount of fuel used for the reason that the heat comes in intimate contact not only with the water tubes but with the central water chamber and with the inside Wall of the water leg 10 and even the water pipes that connect the water chamber to the water leg and the pipes which connect the steam space at the upper end of the water leg to the steam chamber 14 are subjected to the heat, as is the steam chamber 14.

Obviously many changes might be made in the details of construction and arrangement of parts without departing from the spirit of the invention as defined in the appended claim.

I claim A steam boiler comprising a water leg, a Water chamber located therein and spaced therefrom, pipes connecting the chamber with the leg at the upper and lower portions thereof, pipe coils located in the space between the leg and the chamber and connected at their ends With the leg, the convolutions of the coils of said pipes being substantially elliptical in plan and the major axes of said ellipses being substan tially radially disposed across the space between the water leg and the chamber, the convolutions of each coil being intertwined in overlapping relation with the convolutions of the adjacent coils and a heater located below the coils.

In testimony whereof I hereunto afiix my signature.

SOLOMON L. BLOCHER. 

